We have been using ObjectPlanet's EasyChart for a decade inside Servoy, to do complex on the fly charting (two axes, line/bar combos, dynamically built as the client changes info). Of late, it is choosing when to load or not load, with no error until the user tries to use it. The error is just that the bean didn't load. I've tried lazy and eager loading (was set to eager for 10 years). We are on a variety of Java versions, mostly 6 51, some 7 all the way to 65. All Servoy 5.2.11. Developer never has trouble loading it. Just our test and production servers to smart clients.
Final clue: often when we toggle the Java control panel into logging or showing the console, the bean loads for a while. But eventually it decides not to. No error until you try to run a line of code that refers to the bean that isn't there.
McAfee is around here, perhaps blocking? We've done lots of testing there, but can't conclusively prove it to I.T.
Anything else I can do?